The article looks at the current international legal regime for assessing foreign interference in the internal affairs of sovereign states. The main focus is on those features of this regime that stem from development of modern information technologies and the expanding range of information countermeasures. Direct or indirect, armed or other external interference or intervention that threaten sovereign legal status and political independence of states have been primarily assessed in the framework of interstate relations. As a rule, legal regime for the use of force in international relations has been reduced to a search for political balance of applicable norms, depending on the means and methods of the use of force. However, the emergence of new forms and methods of interference that rely on the use of information technologies proves existing regulatory mechanisms insufficient. This may lead to adjudication of international responsibility for infringements on sovereignty of states subjected to such interference.